EPE Association: EPE 2007 - Subtopic 05-3

EPE 2007 - Subtopic 05-3 - LS: Matrix Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 05: 'Hard switching converters and control' > EPE 2007 - Subtopic 05-3 - LS: Matrix Converters

   [return to parent folder]

   The Modulation Method for The Three-level-Output-Stage Sparse Matrix Converter
By Meng Yeong Lee; Patrick Wheeler; Christian Klumpner [View]
[Download]

Abstract: In order to control motion and to improve efficiency of an electromechanical conversion chain, variable voltage and variable frequency AC drives have been widely used in commercial applications. The need for a bulky and limited lifetime energy storage electrolytic capacitor in the DC link is a major disadvantage for a traditional AC-DC-AC power converter so alternative topologies have been researched extensively. Matrix converter is a forced-commutated AC-AC power converter topology that directly converts energy from an AC source to an AC load without the use of an energy storage element. From this family, the three-level-output-stage matrix converter is a topology that can synthesise three-level voltage to improve the output performance in terms of reduced harmonic contents. This paper proposes a modulation scheme for this topology. Realistic simulation results prove the ability of this converter topology to produce better output voltages when compared to a conventional matrix converter and also to maintain a sinusoidal input current.

   A Novel Control Strategy for Direct Interface Converters Used for DC and AC Power Supplies
By Koji Kato; Jun-ichi Itoh [View]
[Download]

Abstract: This paper proposes a novel control method for a direct interface converter for management of the energy flow in either an AC or DC supply. The proposed converter is constructed based on an indirect matrix converter. Therefore a proposed control strategy is based on an indirect control method with a triangular carrier wave. This paper proposes two control methods, using a boost up and a step down type DC/DC converter. The basic operation of the proposed control method is confirmed by simulation and experimental results. In addition, this paper also proposes a commutation error compensation method for an output voltage error and an input current error for an indirect matrix converter. In the proposed method, the output voltage and input current error by the commutation can be compensated at the same time, because the PWM pulse of each switch is directly compensated. The validity of the proposed method is confirmed by experimental results. Those results prove that the proposed compensation method can decrease total harmonic distortion (THD) of the input and output current.

   Resonance Suppression Control in Complex Frame for Three-Phase to Three-Phase Matrix Converters
By Tomoyasu Nunokawa; Takaharu Takeshita [View]
[Download]

Abstract: This paper presents a control scheme of matrix converters for suppressing the resonance of the input filter. The principle of the resonance suppression is that the matrix converter absorbs the harmonic power of the resonant components. The effectiveness of the proposed suppression control scheme has been verified by experiments.

EPE 2007 - Subtopic 05-3 - LS: Matrix Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 05: 'Hard switching converters and control' > EPE 2007 - Subtopic 05-3 - LS: Matrix Converters
	[return to parent folder]

	The Modulation Method for The Three-level-Output-Stage Sparse Matrix Converter By Meng Yeong Lee; Patrick Wheeler; Christian Klumpner	[View] [Download]
Abstract: In order to control motion and to improve efficiency of an electromechanical conversion chain, variable voltage and variable frequency AC drives have been widely used in commercial applications. The need for a bulky and limited lifetime energy storage electrolytic capacitor in the DC link is a major disadvantage for a traditional AC-DC-AC power converter so alternative topologies have been researched extensively. Matrix converter is a forced-commutated AC-AC power converter topology that directly converts energy from an AC source to an AC load without the use of an energy storage element. From this family, the three-level-output-stage matrix converter is a topology that can synthesise three-level voltage to improve the output performance in terms of reduced harmonic contents. This paper proposes a modulation scheme for this topology. Realistic simulation results prove the ability of this converter topology to produce better output voltages when compared to a conventional matrix converter and also to maintain a sinusoidal input current.

	A Novel Control Strategy for Direct Interface Converters Used for DC and AC Power Supplies By Koji Kato; Jun-ichi Itoh	[View] [Download]
Abstract: This paper proposes a novel control method for a direct interface converter for management of the energy flow in either an AC or DC supply. The proposed converter is constructed based on an indirect matrix converter. Therefore a proposed control strategy is based on an indirect control method with a triangular carrier wave. This paper proposes two control methods, using a boost up and a step down type DC/DC converter. The basic operation of the proposed control method is confirmed by simulation and experimental results. In addition, this paper also proposes a commutation error compensation method for an output voltage error and an input current error for an indirect matrix converter. In the proposed method, the output voltage and input current error by the commutation can be compensated at the same time, because the PWM pulse of each switch is directly compensated. The validity of the proposed method is confirmed by experimental results. Those results prove that the proposed compensation method can decrease total harmonic distortion (THD) of the input and output current.

	Resonance Suppression Control in Complex Frame for Three-Phase to Three-Phase Matrix Converters By Tomoyasu Nunokawa; Takaharu Takeshita	[View] [Download]
Abstract: This paper presents a control scheme of matrix converters for suppressing the resonance of the input filter. The principle of the resonance suppression is that the matrix converter absorbs the harmonic power of the resonant components. The effectiveness of the proposed suppression control scheme has been verified by experiments.